/*
 * Copyright (C) 2010 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.web.controller.regexp;

/**
 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
 * @version $Revision$
 */
public enum GroupType
{

   CAPTURING_GROUP("(", ")"),

   NON_CAPTURING_GROUP("(?:", ")"),

   POSITIVE_LOOKAHEAD("(?=", ")"),

   NEGATIVE_LOOKAHEAD("(?!", ")"),

   POSITIVE_LOOKBEHIND("(?<=", ")"),

   NEGATIVE_LOOKBEHIND("(?<!", ")");

   /** . */
   private static final GroupType[] ALL = values();

   public static GroupType forPrefix(String s)
   {
      if (s == null)
      {
         throw new NullPointerException("No null prefix accepted");
      }
      // No need for a fast lookup, iteration on array will do well
      for (GroupType type : ALL)
      {
         if (type.open.equals(s))
         {
            return type;
         }
      }
      return null;
   }

   /** . */
   private final String open;

   /** . */
   private final String close;

   GroupType(String open, String close)
   {
      this.open = open;
      this.close = close;
   }

   public String getOpen()
   {
      return open;
   }

   public String getClose()
   {
      return close;
   }
}
